- Buccal periimplant mucosa margin: Distance between mid-facial gingival margin and incisal edge of the implant restoration At implant crown insertion, the distance from the zenith of the implant restoration to the most coronal part of the incisal edge will be measured from study casts and digital photographs. This measurement will serve to determine the buccal gingival recession/growth when compared with further measurements. It will be recorded as "0" at the implant crown insertion. (Figure 5)